Motor-driven shear means



Dec. 16, 1 95'2 Mz. man@ 2,621,404

MoToR-DRIvEN SHEAR MEANS Filed Feb. 21. 1952 2 SHEETS=-SHEET l INVENTOR.1915 Carl M. Koons Attorney Dec. 16, 1952 C, M, KQONS 2,621,404

MOTOR-DRIVEN SHEAR MEANS Filed Feb. 2l. 1952 y 2 SHEETS-SHEET 2 3, l Lnl' r INVENTOR. Carl M K oons Attorhov Patented Dec. 16, 1952 UNITEDsTATEs PATENT OFFICE 10 Claims.

My invention relates to motorized shear mechanism which is useful forbarbers, for tonsorial purposes, as well as for cutting material, suchas textiles, `and the like.

An important object of my invention is to provide a mechanism of the-aforementioned character, embracing a casing having a prime movermounted therein, and shear means extending therefrom, interconnected tothe said prime imover means by means of duplex universal coupling means.

Another object of my invention is to provide in a mechanism of theaforementioned character, shear means consisting of pivotally connectedcross members provided at the actuating extremities thereof, With ridingsaddle means in order to insure the proper cutting action of the saidshear means.

Another object of my invention is to provide, in a mechanism of theaforementioned character, switch control means provided with brake shoemeans adapted to set the said brake shoe means into inoperative positionwhen the switch means is in operative position, and vice versa.

Another object of my invention is to provide a mechanism of theaforementioned character, which is of simple construction, can be heldin the hand for manipulative purposes in guiding thecutting shear meansthereof, and is of such simple elemental construction as to lend itselfideally to economical manufacture in quantity production.

Other features and objects inherent in my invention will become apparentfrom an examination of the accompanying drawings, bearing furtherelucidation in the ensuing description, in which like numerals designatelike parts, and in which:

Fig. 1 is a longitudinal cross-sectional view of my invention, showingthe shears in closed position, the switch means being in idle orinoperative position.

Fig. 2 is a view similar to Fig. l, showing the shears in open position,and the switch means in operative position.

Fig. 3 is a fragmentary cross-sectional view taken, substantially, onthe lines 3-3 of Fig. 1.

Fig. 4 is a fragmentary and enlarged crosssectional View taken,substantially, on the lines 4 4 of Fig. 2.

Fig. 5 is a staggered cross-sectional view taken, substantially, on thelines 5-5 of Fig. l.

. Fig. 6 is a cross-sectional view taken, substantially, on the lines6-6 of Fig. 1.

Fig. l is a cross-sectional view taken, substantially, on the lines 'I-Iof Fig. 2.

Fig. 8 is a perspective exploded view showing the detailed elementalstructure of the duplex universal means comprising an essential elementof my invention. Referring to the various views, my invention isgenerally designated 9 and consists of an outer shell or case made intwo halves, designated respectively Ill and I I.

The said halves, I0 and II, 'are provided with bosses arranged instaggered relationship, and designated I2 and I3 to furnish suitableanchorage for the screws I4 and I5 to maintain the two halves in compactand assembled relationship.

Within the casing comprised of the halves I0 and II is mounted a primemover Il. It will be noted that the casing has a hump portion I6, toaccommodate the switch means 3| and the trip lever mechanism 2 I, itshould be also noted, that the prime mover is provided with an extensionof the driving shaft I8 operating in bearings 52 and 53.

On the 'inner terminal of the driving shaft I8 is mounted the flywheelI9. The said flywheel has secured thereto a lug portion 32 having a ballterminal portion 33 which is seated in one of the sockets 39 or 38 ofthe individual coupling element 34, which provide the duplex universalconnection means from the flywheel I9 to the movable shear blade 42, sothat its motivation with respect to the stationary blade 43 will causethe cutting edges of the shear means to afford a shearing action to outmaterial inserted there between.

The blades 42 yand 43 are cross members and :are pivoted by the pivotscrew 44 and at the interior termini thereof the shear blade 42 is pro-Avided with a riding saddle 46, which operates on the stationary saddle41 of the blade 43.

The stationary blade is secured by screws 48 to the case section I0.Both sections are provided with slotted openings 45 to furnish clearancefor the movement of the shear blade 42.

The saddle portion 46 terminates in extension 35 which has a ballportion 3l operating in the socket 38 or 39. The clamp screw 35 retainsthe two sections of the duplex universal connecting Ijoint 34 inassemblage with the ball portions 33 Iand 3l.

When the flywheel I9 rotates, it will impart to the movable shear blade42 motion Within the ambit or range exemplified comparatively betweenFigures 1 and 2.

The prime mover is energized through the circuit 5I, Ito which a switchelement 3l is connected, the switch button thereof being depressed bythe switch actuating lever 2| which has web portions 22 forreinforcement thereof, as well as for mounting the same articulately onthe pivot 23, which also furnishes the means for holding the coiledportion of the spring zii so that its two terminals, namely, theterminal 26 rests against the inner wall 2l of the shell, and the otherterminal 25 of the spring 2li, restsl on a brake shoe G, which isadapted to operate against the peripheral portion d of the flywheel ifi.

It will be noted that the switch actuating lever 2i is provided with aswitch button 28 having a hooking latch 2d, adapted to catch the bottomportion of the web Eil when in operative position.

lt will also be noted that when the switch lever 2l, operable in slot2i), is locked by the hooking latch 29, in operative position,illustrated in Fig. 2, the brake shoe 50 is free from engagement withthe peripheral portion 49 of the flywheel I9, thus permitting the shearblade 42 to be oscillated to operate effectively in cutting whatevermaterial is inserted between the shear blades 152 and 43.

Whereas, when the switch button 28 is slid in slot 55 in the switchactuating element 2i, so as to cause the same to be released fromengagement with the web 3G, then the lever, or element 2 i, is releasedby virtue of the action of the terminal portions and 26 of the spring2li, simultaneously causing the brake shoe E9 to engage the peripheralportion $9 of the ilywheel i9, thus eiectively stopping movement of theblade 132, the

switch 3| also being released by spring pressurel which normally tendsto maintain the switch in operative position.

It will be noted in Fig'. 8 that the duplex universal coupling Se hasclearance openings Iii and Gli to permit the extensions 36 and 32 tooperate freely therein, and not impair, nor impede the operation of theduplex universal coupling 34 in its rotational ambit, during whichcourse of aotion it will be subjected to resultant angular movements, inorder to translate the rotary motion of the flywheel i9 to anoscillating motion of the blade 42,

To operate the shears it is grasped in one hand, the lever 2l isdepressed in order to close the circuit by means of switch 3 i Theswitch actua'tes lever 2l being locked in operative position by thehooking latch 2d engagingithe lower or inner portion of the web 3E.

The device is then held conveniently in the hand and may be manipulatedfor tonsorial purposes, hair cutting, cutting of textile materials, andthe like.

When the cutting operation is completed, the hooking latch 29 is causedto be disengaged from the web Sil allowing the potential energy storedin the spring Zfl to be converted to kinetic energy, releasing theswitch actuating lever 2i, simultaneously releasing the switch Si,opening the electrical circuit and simultaneously with that operationcausing the spring 24 to effectuate a braking action of the brake shoe50 against the peripheral surface 29 of the flywheel i9.

I believe I have herein illustrated and described the nature of myinvention, and expounded, in expository form, the teachings so thatthose familiar with the art will be able to practice my invention.Inasmuch as the same is susceptible of many modiiications, alterations,and improvements, hereby reserve the right to any improvements,alterations and modifications coming within the scope and spirit of myinvention and disclosure, also the right to any improvements impliablyembraced in the accompanying illustra` tions depicting the generallysuggested elemental structure of my invention, and also anymodifications, improvements, or alterations, falling within the purviewof the foregoing description; my invention to be limited only by thesubjoined claims.

Having thus disclosed and revealed my invention, what claim as new anddesire to secure by Letters Patent is:

l. Motorized shear means, comprising a, shell enclosure, a prime moverconned within the shell enclosure, flywheel means mounted on the rotorof the said prime mover, shear means including pivoted cross members,namely, a stationary cross member provided with a saddle portion securedinteriorly of the said shell enclosure, and an oscillating cross memberprovided with a saddle portion adapted to ride on the saidinst-mentioned saddle portion, primary ball means eccentrically mountedon the said flywheel means, secondary ball mea-ns mounted on the saidsecond-mentioned saddle portion, and duplex universal meansinterconnecting the said secondary ball means and the said primary ballmeans.

2. Motorized shear means, comprising a shell enclosure, a prime moverconfined within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means including pivoted crossmembers, namely, a stationary cross member provided with a saddleportion secured interiorly of the said shell enclosure, and anoscillating cross member provided with a saddle portion adapted to rideon the said first-mentioned saddle portion, primary ball meanseccentrically mounted on the said flywheel means, secondary ball meansmounted on the said second-mentioned saddle portion, duplex universalmeans interconnecting the said secondary ball means and the said primaryball means, and spring-urged switch means connected to the said primemover and normally maintained in inoperative position.

3. Motorized shear means, comprising a shell enclosure, a prime moverconned within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means including pivoted crossmembers, namely, a stationary cross member. provided with a saddleportion secured interiorly of the said shell enclosure,

and an oscillating cross member provided with a saddle portion adaptedto ride on the said rstmentioned saddle portion, primary ball meanseccentrically mounted onthe said flywheel means, secondary ball meansmounted on the said second-mentioned saddle portion, duplex universalmeans interconnecting the said secondary ball means and the said primaryball means, and spring-urged switch means connected to the said primemover and normally maintained in inoperative position, and trip levermeans articulately secured intermediate its ends within the said shellenclosure one end thereof extending beyond the confines of the saidshell enclosure and adapted to depress the said switch means tooperative position.

4. Motorized shear meansycomprising a shell enclosure, a prime moverconfined Within the said shell enclosure, ilywheel means, mounted on therotor of the said prime mover, shear means including pivoted crossmembers. namely, a stationary cross member provided with a 'saddleportion secured interiorly of the said shell enclosure, and anoscillating cross member provided 'With a saddle portionadapted to rideon the said rst-mentioned saddle portion, primary ansiada ball meanseccentrically mounted on thersaid flywheel means, secondary ballmeans'mounted on the said second-mentioned saddle portion, duplexuniversalmeans interconnecting the said secondary ball means and thesaid primary ball means, spring-urged switch means connected to the saidprime mover and normally maintained in inoperative position, trip levermeans articulately secured intermediate its ends within the said shellenclosure one end thereof extending beyond the confines of the saidshell enclosure and adapted to depress the said switch means tooperative position, switch button means secured slidably on the exposedend of the said trip lever means, web means on the said shell enclosure,and hooking latch means on the said switch button means adapted toengage .releasably the said web means to maintain the said switch meansin operative position. v

5. Motorized shear means, comprising a shell enclosure, a prime moverconfined within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means including pivoted crossmembers, namely, a stationary cross member provided with a saddleportion secured interiorly of the said shell enclosure, and anoscillating cross member provided with a saddle portion adapted to rideon the said first-mentioned saddle portion, primary ball meanseccentrically mounted on the said flywheel means, secondary ball meansmounted on the said second-mentioned saddle portion, duplex universalmeans interconnecting the said secondary ball means and the said primaryball means, spring-urged switch means connected to the said prime moverand normally maintained in inoperative position, and trip lever meansarticulately secured intermediate its ends within the said shellenclosure one end thereof extending beyond the confines of the saidshell enclosure and adapted to depress the said switch means tooperative position, the other end of the said trip lever means havingbrake means secured thereto adapted to engage frictionally theperipheral portion of the said flywheel means when the said switch meansis in inoperative position.

6. Motorized shear means, comprising a shell enclosure, a prime moverconfined within the said shell enclosure, ywheel means mounted on therotor of the said prime mover, shear means extending beyond the confinesof the said shell enclosure and including pivoted crossmembers namely, astationary cross member provided with a saddle portion securedinteriorly of the said shell enclosure, and an oscillating cross memberprovided with a saddle portion adapted to ride on the saidinst-mentioned saddle portion, primary ball means eccentrically mountedon the said flywheel means, secondary ball means mounted on the saidsecond-mentioned saddle portion, duplex universal means interconnectingthe said secondary ball means and the said primary ball means,spring-urged switch means connected to the said prime mover and normallymaintained in inoperative position, trip lever means articulatelysecured intermediate its ends within the said shell enclosure one endthereof extending beyond the coniines of the said shell enclosure andadapted to depress the said switch means to operative position, switchbutton means secured slidably on the exposed end of the said trip levermeans, web means on the said shell enclosure, and hooking latch means onthe said switch button means adapted to engage releas- Y 6v ably thesaid web means topmaintain the said switch means in operative position,the other end of the said trip lever means having brake means securedthereto adapted to engage frictionally the peripheral portion of thesaid flywheel means when the saidswitch means is in inoperativeposition.A y

'7. Motorized shear means, comprising a shell enclosure, a prime moverconned within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means extending beyond the confinesof the said shell enclosure and including pivoted cross members, namely,a stationary cross member provided with a saddle portion securedinteriorly of the said shell enclosure, and an oscillating cross memberprovided with a saddle portion adapted to ride on the said rst-mentionedsaddle portion, primary ball means eccentrically mounted on the saidiiywheel means, secondary ball means mounted on the saidsecond-mentioned saddle portion, duplex universal means interconnectingthe said secondary ball means and the said `primary ball means, vandspring-urged switch means connected to the said prime mover and normallymaintained in inoperative position, and trip lever means articulatelysecured intermediate its ends within the. .said shell enclosure one endthereof extending beyond the vconnes of the said shell enclosure andadapted to depress the said switch means to operative position, andspring means urging the said trip lever means to inoperative position.

8. Motorized shear means, comprising a shell enclosure, a prime moverconfined within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means extending beyond the coninesof the said shell enclosure and including pivoted cross members, namely,a stationary cross member provided with a saddle portion securedinteriorly of the said shell enclosure, and an oscillating cross memberprovided with a saddle portion adapted to ride on the saidfirst-mentioned saddle portion, primary ball means eccentrically mountedon the said ywheel means, secondary ball means mounted on the saidsecond-mentioned saddle portion, duplex universal means interconnectingthe said secondary ball means and the said primary ball means,spring-urged switch means connected to the said prime mover and normallymaintained in inoperative position, trip lever means articulatelysecured intermediate its ends within the said shell enclosure one endthereof extending beyond the connes of the said shell enclosure andadapted to depress the said switch means to operative position, switchbutton means secured slidably on the exposed end of the said trip levermeans, web means on the said shell enclosure, and hooking latch means onthe said switch button means adapted to engage releasably the said webmeans to maintain the said switch means in operative position, andspring means urging the said trip lever means to inoperative position.

9. Motorized shear means, comprising a shell enclosure, a prime moverconflned within the said shell enclosure, ilywheel means mounted on therotor of the said prime mover, shear means extending beyond the confinesof the said shell enclosure and including pivoted cross members, namely,a stationary cross member provided with a saddle portion securedinteriorly of the said shell enclosure, and an oscillating cross memberprovided with a saddle portion adapted to ride on the said mst-mentionedsaddle portion, .primary ball means eccentrically mounted on the saidflywheel means, secondary bali means mounted on the saidsecond-mentioned saddle portion, duplex universal means interconnectingthe said secondary hall means and the said primary ball means,spring-urged switch means connected to the said prime mover and normallymaintained in inoperative position, trip lever means articulatelysecured intermediate its ends within the said shell enclosure one endthereof extending beyond the confines of the said shell enclosure andadapted to depress the said switch means to operative position, theother end of the said trip lever means having brake means securedthereto adapted to engage frictionally the peripheral portion of thesaid iiywheel means when the said switch means is in inoperativeposition, and spring means urging the said trip lever means toinoperative position.

10. Motorized shear means, comprising a shell enclosure, a prime moverconiined within the said shell enclosure, flywheel means mounted on therotor of the said prime mover, shear means er tending beyond theconfines of the said shell en ciosure and including pivoted crossmembers, namely, a stationary cross member provided with a saddleportion secured interiorly of the said shell enclosure, and anoscillating cross member provided with a saddle portion adapted to rideon the said first-mentioned saddle portion, primary ball meanseccentrically mounted on the said ywheel means, secondary ball meansmounted on the said second-mentioned saddle portion, duplex universal.means interconnecting the said secondary ball means and the saidprimary ball means, spring-urged switch means connected to the saidprime mover and normally maintained in inoperative position, trip levermeans articulately secured intermediate its ends within the said shellenclosure one end thereof extending beyond the confines of the saidshell enclosure and adapted to depress the said switch means tooperative position, switch button means secured slidably on the exposedend of the said trip lever means, web means on the said shell enclosure,hooking latch means on the said switch button means adapted to engagereleasably the said web means to maintain the said switch means inoperative position, the other end of the said trip lever means havingbrake means secured thereto adapted to engage rictionally the peripheralportion of the said flywheel means when the said switch means is ininoperative position, and spring means urging the said trip lever meansto inoperative position.

CARL M. KOONS.

No references cited.

